| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ANIMATION_CLOCK_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ANIMATION_CLOCK_H_ |
| |
| #include <limits> |
| |
| #include "base/macros.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/time.h" |
| |
| namespace blink { |
| |
| // Maintains a stationary clock time during script execution. Tries to track |
| // the glass time (the moment photons leave the screen) of the current animation |
| // frame. |
| class CORE_EXPORT AnimationClock { |
| DISALLOW_NEW(); |
| |
| public: |
| using TimeTicksFunction = base::TimeTicks (*)(); |
| explicit AnimationClock( |
| TimeTicksFunction monotonically_increasing_time = WTF::CurrentTimeTicks) |
| : monotonically_increasing_time_(monotonically_increasing_time), |
| time_(), |
| task_for_which_time_was_calculated_( |
| std::numeric_limits<unsigned>::max()) {} |
| |
| void UpdateTime(base::TimeTicks time); |
| double CurrentTime(); |
| void ResetTimeForTesting(base::TimeTicks time = base::TimeTicks()); |
| void DisableSyntheticTimeForTesting() { |
| monotonically_increasing_time_ = nullptr; |
| } |
| |
| // notifyTaskStart should be called right before the main message loop starts |
| // to run the next task from the message queue. |
| static void NotifyTaskStart() { ++currently_running_task_; } |
| |
| private: |
| TimeTicksFunction monotonically_increasing_time_; |
| base::TimeTicks time_; |
| unsigned task_for_which_time_was_calculated_; |
| static unsigned currently_running_task_; |
| DISALLOW_COPY_AND_ASSIGN(AnimationClock); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ANIMATION_CLOCK_H_ |